As Biff walked away from Sarah he was laughing to himself at how obvious her arousal was. He was proud of the effect he had on Sarah. It seemed she was always having to hide her boner whenever they made out in public. He was just as aroused as she was but glancing down at the smooth crotch of his skin tight yoga pants he was glad that he didn't have the same problem as Sarah. He loved having a vagina. He could leer at girls and let his arousal run wild without any fear of being caught. He remembered loads of times when his friends had been publicly embarrassed by their erections, particularly when they were all younger and their teenage hormones were running wild. The worst Biff had to deal with was a moist feeling in his panties. He was starting to feel that now as his plumbing was lubricating itself at the thoughts of Sarah and her big erection. Biff licked his lips at the thought. Maybe he and Sarah would get some time alone again soon. They had had sex several times in the past but it was hard to get privacy at their age. Biff was always the one to initiate things with Sarah, he'd get her in the mood, get her good and hard and then mount her and ride her as hard as he could. They were a good match and he felt lucky to have her in his life.
Biff grabbed everything he needed from his locker and hurried to the bathroom to pee before his first class. He went into the men's room and found a free stall. He hung his backpack on the door of the stall and peeled his yoga pants down to his knees. He admired the lace pattern of his panties that was hugging his crotch for a moment before sliding them down too. He turned his back to the toilet and sat down on his plump ass and relaxed his muscles. When he was finished he wiped himself dry, pulled back up his panties and then had to work his tight pants back up and over his hips. He exited the stall, washed his hands and hurried off to his next class.
Biff passed Sarah in the hall and the two made eye contact and smiled at each other. Biff took a second to admire the bulge that Sarah was packing in her shorts and hoped he'd get a chance to play with it again soon. Biff entered the classroom for his first class of the day, maths. He took his usual seat down the back next to his buddy Moose. He sat down and naturally crossed his legs high above the knee and turned himself in to his seat.
Moose turned to Biff and said with a grin, "Hey dude, how's it hanging?"
Biff replied with a smirk, "Fuck you dude, you know I've got nothing hanging!" This was a running joke these two friends shared. They quickly turned their attention to last night's homework, just about gsthering enough answers between them to show a decent effort to their teacher who was just entering their room.
